D2D processing method and device

A technology of communication processing and physical resources, which is applied in the field of device-to-device processing, and can solve problems such as restricting UE mutual listening and D2DUE not being able to monitor.

Inactive Publication Date: 2016-04-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the implementation of the existing two working modes, since the duplexing will restrict mutual listening between UEs, D2D UE may not be able to monitor the SA

Method used

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Examples

Experimental program
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no. 1 example

[0192] In the first embodiment, it is assumed that the time domain resources include 8 subframes, the frequency resources of the resource pool include 4 PRBs, and the frequency domain is divided into groups of two by two. In the first embodiment, the sequence numbers can be arranged in time or in the direction of frequency, and the sequence numbers can be divided into upper and lower sections according to the frequency. The location of the resource.

[0193] Figure 3(a) is a schematic diagram of the first SA mode in the first embodiment of the present invention, wherein the frequency domain is an even number of SA resource units, and the relative positional relationship is in the upper and lower frequency bands, and the SA resource units circulate counterclockwise Schematic diagram of the SA mode. For counterclockwise rotation,

[0194] In the time domain, second_nt=mod(first_nt+first_nf+shift_t, Nt);

[0195] In the frequency domain, second_nf=first_nf+ceil(Nf / 2);

[0196...

no. 2 example

[0207] In the second embodiment, assuming that any frequency domain is separated by two pairs,

[0208] In the time domain,

[0209] For clockwise circulation mode, second_nt=mod[Nt+first_nt+floor(first_nf / (2×shift_f))×shift_f+mod(first_nf, shift_f)-shift_t, Nt], i.e. reverse circulation;

[0210] For the counterclockwise circulation mode, second_nt=mod[first_nt+floor(first_nf / (2×shift_f))×shift_f+mod(first_nf, shift_f)+shift_t, Nt], that is, forward circulation;

[0211] In the frequency domain,

[0212] second_nf=first_nf+shift_f−floor[(first_nf+shift_f) / Nf]×[1+mod(first_nf, shift_f)].

[0213] Among them, the floor operator means to take the smallest integer.

[0214] The third formula above is equivalent to:

[0215] When the retransmission does not exceed Nf, in the frequency domain, second_nf=first_nf+shift_f;

[0216] When the retransmission exceeds Nf, in the frequency domain, second_nf=first_nf+shift_f–[1+mod(first_nf, shift_f)];

[0217] When Nf is odd (i.e. th...

no. 3 example

[0228] The third embodiment, this embodiment is used to illustrate the resource indication method:

[0229] 1) Configure the SA resource pool according to preset rules. For example, the SA resource pool has a total of 128 physical resource units, which are paired according to frequency domain resources, after time domain cyclic shift, or according to the rules of mutual listening within the resource as much as possible, 64 logical resource locations can be determined, and a 6-bit indication is required.

[0230] 2) The serial number means that logical resources do not occupy all physical resources, such as Figure 5 as shown, Figure 5 It is a schematic diagram of the SA in the third embodiment of the present invention, wherein only part of the SA resource units in one SA cycle are sorted according to the rules, that is, only part of the SA resource units are applicable, so that all users can be guaranteed when the resource pool is large enough Mutual listening is possible. ...

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Abstract

The invention discloses a D2D processing method and device. The method comprises that according to a preset strategy to determine the position relation between an initial transmission resource unit and a retransmission resource unit, resource configuration information of SA information for D2D communication is determined; and according to the determined SA information for D2D communication, resource is obtained, and D2D communication processing is implemented. According to the method of the invention, the position relation between the initial transmission resource unit and the retransmission resource unit is determined to prevent duplex performance from limiting inter-listening between UE, and the D2D UE can monitor the SA of the D2D UE which is sent at the same time in other time.

Description

technical field [0001] The present invention relates to short-distance communication technology, in particular to a method and device for realizing device-to-device (D2D, Device-to-Device) processing. Background technique [0002] Short-distance data sharing between users, small-scale social and commercial activities, and specific services for specific local users are gradually becoming a growth point that cannot be ignored in the next stage of wireless platforms. For such types of services with obvious local characteristics, in general, the source of their service data does not need to pass through the core network, and only needs to be completed between user terminals. This communication mode is also referred to as a D2D communication mode, and has characteristics that are obviously different from the traditional cellular system communication mode. For short-distance communication users who can apply D2D communication, D2D transmission not only saves wireless spectrum res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W72/0446H04W76/14H04L41/0893Y02D30/70
Inventor 王文焕吴栓栓卢有雄李儒岳黄双红
Owner ZTE CORP
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